CN210343417U

CN210343417U - Realize closely knit filling system that full roof was met in collecting space area filling tunnel in pit

Info

Publication number: CN210343417U
Application number: CN201920419929.6U
Authority: CN
Inventors: 路彬; 耿华锋; 刘佳
Original assignee: Xinwen Mining Group Co Ltd
Current assignee: Xinwen Mining Group Co Ltd
Priority date: 2019-03-29
Filing date: 2019-03-29
Publication date: 2020-04-17
Anticipated expiration: 2029-03-29

Abstract

The utility model discloses a realize that collecting space area fills closely knit filling system that tunnel fully meets a roof in pit, it is including arranging a plurality of material jars, pond, aboveground mixer, slurry storage tank and waste rock storehouse in the pit to and arrange in coal gangue surge bin, coal gangue separation waste rock surge bin, mixer, wind-force conveying system, water pump in the pit, establish the first fender thick liquid wall of port under filling the tunnel and establish the second fender thick liquid wall of port on filling the tunnel. Utilize the utility model discloses the key realization carries out cementitious material to fill the triangle region on the tunnel to realize the closely knit nature and the crushing resistance of filling in whole tunnel, improve working face filling efficiency, the closely knit filling intensity of reinforcing gangue is particularly suitable for the cementitious filling workplace.

Description

Realize closely knit filling system that full roof was met in collecting space area filling tunnel in pit

Technical Field

The utility model belongs to the technical field of the coal mine filling and mining, be particularly useful for a method of closely knit packing of tunnel gangue cementation in pit.

Background

With the industrial and agricultural production, urban and rural construction and the development of highways and railways, the coal pressure of 'three lower' coal mines in China reaches 140 hundred million tons, and the reasonable development of coal resources and the sustainable development of mines are severely restricted. Since eighteen years, the country highly attaches importance to the ecological civilization construction, and how to safely and efficiently extract stagnant resources of 'three next to one up' (under railways, under buildings, under water bodies and on pressure-bearing water) pressed coal has important significance for promoting the sustainable development of mines.

In the period of great development of coal industry, coal mine filling and mining technology is different day by day, and according to different used filling materials and conveying modes, filling processes applied in China mainly comprise dry filling, hydraulic filling, cemented filling, wind filling and the like, and particularly cemented filling is widely applied to underground coal mines and nonferrous metal mines.

The filling mode is to mix the cementing material with solid materials such as coal gangue, fly ash and the like, so that the curing strength of a filling body is improved, and during filling, the mixed slurry flows to a goaf by using a water-jet object self-flow filling process, and is cemented and condensed within a controllable time, so that the filling design strength is achieved, the goaf is filled, the deformation of surrounding rocks is controlled, and the subsidence of the earth surface is avoided. Because the filling slurry is filled to the lower part of the goaf by the self-flowing of the water-washed object fluid to realize the compact filling, but the upper space of the goaf has the problems of gaps and incompact, particularly, the compact filling can not be realized in the upper triangular area of the nearly horizontal filling surface, so that the problems that the upper triangle of the filling roadway can not be fully abutted and the filling efficiency is low are caused.

SUMMERY OF THE UTILITY MODEL

In order to solve there is space and uncompacted problem in collecting space area upper portion space, especially solve the last triangle region of nearly horizontal filling face and can't realize closely knit filling, cause to fill the lane on the triangle can not fully meet a set and fill a difficult problem of inefficiency, the utility model provides a realize that collecting space area fills the filling system that the tunnel fully meets a set.

In order to achieve the purpose, the utility model adopts the technical proposal that:

the utility model provides a realize that gob fills full dense filling system who meets a roof in pit, its characterized in that, it includes two parts in the pit and in the pit, wherein:

the aboveground part comprises a plurality of charging buckets, a water pool, an aboveground stirrer, a slurry storage tank and a gangue dump bin;

the underground part comprises a coal gangue buffer bin, a coal gangue separation waste rock buffer bin, an underground stirrer, a wind power conveying system, a water pump, a first slurry blocking wall arranged at the lower port of the filling roadway and a second slurry blocking wall arranged at the upper port of the filling roadway; the underground wind power conveying system comprises a wind power filling machine and a wind power conveying pipeline;

according to the trend of the slurry and the gangue, the connection relationship of the components is as follows:

the discharge port of the charging bucket and the water outlet of the water pool are respectively communicated with the feed port of the aboveground mixer through pipelines, the discharge port of the aboveground mixer is communicated with the slurry storage tank, the discharge port of the slurry storage tank is divided into two paths through a slurry conveying pipeline, one path is communicated with the end of a second slurry retaining wall and is connected with the tail end of a wind power conveying pipeline, and the wind power conveying pipeline enters a filling working surface through the upper end of the second slurry retaining wall 15; the other path of the gas is communicated with a feed inlet of an underground stirrer, and a discharge outlet of the underground stirrer is communicated with a goaf from an upper port of a filling roadway through a pipeline and a water pump pipeline in parallel;

the underground coal gangue buffer bin is communicated with the underground coal gangue buffer bin through pipelines; the discharge hole of the underground coal gangue buffer bin is divided into two paths, one path is communicated with the feed hole of the underground wind filling machine, the discharge hole of the wind filling machine is communicated with the port of the second grout stopping wall through a wind conveying pipeline, and the other path is communicated with the feed hole of the underground stirrer.

The method for filling and roof-contacting by using the filling system,

firstly, the method comprises the following steps: the method comprises the steps that waste rocks in a ground waste rock storage bin are vertically placed in an underground transportation roadway through waste rock conveying holes in advance, the waste rocks and the waste rocks in an underground coal and waste rock separation waste rock buffer bin are crushed respectively, and then the waste rocks with the grain size of 20-25 mm are sorted out by a sorting machine and reach a coal gangue buffer bin 9 of a filling working face through a belt conveyor and a transfer conveyor;

secondly, the method comprises the following steps: the water in a charging bucket and a water pool is reasonably proportioned and then fully stirred in a stirrer to prepare mixed slurry for filling and mining, the mixed slurry is sent to a slurry storage tank, and the mixed slurry is conveyed to an underground filling working face through a slurry conveying pipeline by utilizing static pressure;

thirdly, the method comprises the following steps: filling the goaf filling roadway, wherein the specific filling method comprises the following steps:

3.1: firstly, arranging a first slurry blocking wall at the lower port of a roadway of an underground goaf, and sealing and reinforcing;

3.2: conveying the mixed slurry of the slurry storage tank to a filling working surface by using static pressure, discharging the mixed slurry conveyed to the filling working surface and the coal gangue stored in a coal gangue buffer bin according to a proportion, under the action of self weight and the flushing of a water pump pipeline, mixing while flowing by virtue of a coal seam inclination angle, finally forming a mixture which takes the coal gangue with a certain particle size as aggregate and cement as cementing material, automatically filling the mixture to a goaf filling roadway, forming a self-flowing filling area, and stopping filling until the mixture is filled to the upper half part of the roadway, which is close to a horizontal angle, and cannot form peristaltic self-flowing;

3.3: arranging a first slurry blocking wall at an upper port of the goaf filling roadway while filling the lower part of the goaf filling roadway in a water-jet logistics gravity flow mode, and performing sealing and reinforcing treatment;

3.4: the coal gangue in the coal gangue buffer bin filled on the working face is conveyed to the filling working face through a wind conveying pipeline by a wind filling machine, the coal gangue in the wind conveying pipeline 14 and the mixed slurry in the slurry conveying pipeline are sprayed and fused at the upper end opening of the first slurry blocking wall, so that a mixture with a certain particle size, the coal gangue serving as aggregate and the mixed slurry serving as binder is filled to an upper triangular part of a filling roadway, which exceeds a horizontal angle, to form a compact upper triangular filling body.

The utility model discloses each of the constitution that filling system adopted is the product of selling, the utility model discloses what protect is not the concrete structure of each constitution, what protect is that each constitutes arranges the relation and the positional relationship each other. In addition, the connection relation and the working method of the wind filling machine and the wind conveying pipeline of the utility model are the prior art, and are not detailed here.

The utility model has the advantages that: the utility model discloses on the basis of water-washed waste rock wriggling gravity filling tunnel lower part, utilize the impulse wind ripples to blow the waste rock and fill up the upper portion in closely knit tunnel, the key carries out cementitious material to three angular regions on filling the tunnel and fills to realize the filling closely knit nature and the crushing resistance in whole tunnel, improve the working face and fill efficiency, the closely knit filling strength of reinforcing gangue is particularly suitable for the cemented filling operation place.

Drawings

Fig. 1 is a schematic layout diagram of an embodiment of the filling system of the present invention.

In the figure: 1-a cement tank, 2-a fly ash tank, 3-a water tank, 4-an aboveground mixer, 5-a slurry storage tank, 6-a slurry conveying pipeline, 7-a gangue stacking bin, 8-a gangue separation gangue buffer bin, 9-a gangue buffer bin, 10-an underground mixer, 11-a water pump, 12-a gravity flow filling area, 13-a wind power filling machine, 14-a wind power conveying pipeline, 15-a second slurry blocking wall, 16-an upper triangular filling body and 17-a first slurry blocking wall.

Detailed Description

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

As shown in fig. 1, the filling system of the present invention comprises a downhole part and a downhole part, wherein:

the aboveground part comprises a cement tank 1, a fly ash tank 2, a water pool 3, an aboveground stirrer 4, a slurry storage tank 5 and a gangue storage bin 7;

the underground part comprises a slurry conveying pipeline 6, a coal gangue separation gangue buffer bin 8 arranged on a coal face, a coal gangue buffer bin 9, an underground stirrer 10, a wind filling machine 13, a wind conveying pipeline 14 and a water pump 13 arranged on a filling face, a first slurry blocking wall 17 arranged at the lower end of a filling roadway and a second slurry blocking wall 15 arranged at the upper end of the filling roadway.

The connection relationship of the components is described according to the trends of the slurry and the gangue.

The discharge ports of the cement tank 1 and the fly ash tank 2 are respectively communicated with the feed port of an aboveground stirrer 4 through pipelines, the discharge port of the aboveground stirrer 4 is communicated with a slurry storage tank 5, the discharge port of the slurry storage tank 5 is divided into two paths through a slurry conveying pipeline 6, one path is communicated with the upper port of a second slurry retaining wall 15 and is connected with the tail end of a wind power conveying pipeline 14, the wind power conveying pipeline 14 enters a filling working surface through the upper end of the second slurry retaining wall 15, the other path is communicated with a downhole stirrer 10, and the downhole stirrer 10 is communicated with the upper port of a filling roadway;

the underground gangue storage bin 7 and the gangue separation gangue buffer bin 8 are communicated with an underground gangue buffer bin 9 through pipelines; the discharge hole of the underground coal gangue buffer bin 9 is divided into two paths, one path is communicated with the feed hole of an underground wind filling machine 13, the discharge hole of the wind filling machine 13 is communicated to the upper port of a second grout stopping wall 15 through a wind conveying pipeline 14, the other path is communicated with the feed hole of an underground stirrer 10, and the underground stirrer 10 is communicated to the upper port of a filling roadway.

The method for densely filling the underground roadway by using the filling system comprises the following steps:

firstly, the method comprises the following steps: waste rocks in a ground waste rock storage bin 7 are vertically placed in an underground transportation roadway through a waste rock conveying hole in advance, and are crushed together with the waste rocks in an underground coal and waste rock separation waste rock buffer bin 8, the waste rocks with the particle size of 20-25 mm are sorted out by a sorting machine and reach a coal gangue buffer bin 9 of a filling working face through a belt conveyor and a transfer conveyor;

secondly, the method comprises the following steps: the water in a cement tank 1, a fly ash tank 2 and a water tank 3 is reasonably proportioned (the preparation ratio of the slurry is 15 percent of cement, 25 percent of fly ash and 50 percent of water), then the mixture is fully stirred in a stirrer 4 to prepare mixed slurry for filling and mining, the mixed slurry is sent to a slurry storage tank 5, and the mixed slurry is conveyed to an underground filling working face through a slurry conveying pipeline 6 by utilizing static pressure;

3.1: firstly, arranging a first slurry blocking wall 17 at the lower port of a roadway of an underground goaf, and sealing and reinforcing;

3.2: conveying the mixed slurry of the slurry storage tank 5 to a filling working surface by using static pressure, discharging the mixed slurry conveyed to the filling working surface and the coal gangue stored in the coal gangue buffer bin 9 according to a ratio of 1:2, flushing the mixed slurry under the action of self weight and a water pipeline of a water pump 11, mixing while flowing by means of a coal seam inclination angle, finally forming a mixture which takes the coal gangue with a certain particle size as aggregate and cement as cementing material, automatically filling the mixture to a goaf filling roadway, forming a self-flowing filling area 12, and stopping filling until the upper half part of the roadway is filled to be close to a horizontal angle and cannot form peristaltic self-flowing;

3.3: arranging a first slurry blocking wall 15 at an upper port of the goaf filling roadway while filling the lower part of the goaf filling roadway in a water-jet logistics gravity flow manner, and sealing and reinforcing the goaf filling roadway;

3.4: the coal gangue in the coal gangue buffer bin 9 for filling the working face is conveyed to the filling working face through a wind conveying pipeline 14 by a wind filling machine 13, the coal gangue in the wind conveying pipeline 14 and the mixed slurry in the slurry conveying pipeline 6 are sprayed and fused at the upper port of a first slurry blocking wall 15, so that a mixture with a certain particle size and taking the coal gangue as aggregate and the mixed slurry as binder is filled to an upper triangular part of a filling roadway, which exceeds the horizontal angle, to form a compact upper triangular filling body 16. The utility model relates to a combine gravity flow and wind power to fill the advantage, can be when the gravity flow fills the working face operation, adopt empty region closely knit to filling the triangle on tunnel upper portion and fill, improved and filled efficiency, solved the problem that the unable closely knit filling of last triangle region, realize that the obturator connects the top by 100% basically, be particularly suitable for the gravity flow even to adopt and fill the operation place even.

Claims

1. The utility model provides a realize that gob fills full dense filling system who meets a roof in pit, its characterized in that, it includes two parts in the pit and in the pit, wherein:

the underground part comprises a coal gangue buffer bin, a coal gangue separation waste rock buffer bin, an underground stirrer, an underground wind power conveying system, a water pump, a first slurry blocking wall arranged at the lower port of the filling roadway and a second slurry blocking wall arranged at the upper port of the filling roadway; the underground wind power conveying system comprises a wind power filling machine and a wind power conveying pipeline;

the discharge port of the charging bucket and the water outlet of the water pool are respectively communicated with the feed port of the aboveground mixer through pipelines, the discharge port of the aboveground mixer is communicated with the slurry storage tank, the discharge port of the slurry storage tank is divided into two paths through a slurry conveying pipeline, one path is communicated with the end of a second slurry retaining wall and is connected with the tail end of a wind power conveying pipeline, and the wind power conveying pipeline enters a filling working face through the upper end of the second slurry retaining wall (15); the other path of the gas is communicated with a feed inlet of an underground stirrer, and a discharge outlet of the underground stirrer is communicated with a goaf from an upper port of a filling roadway through a pipeline and a water pump pipeline in parallel;